JEWELLERY, FINE & APPLIED ART AUCTION Tuesday, 16 August 2022 - 10:00 AM start
A 9½" radius ebony octant by Cox, London,
Estimate: $600 - $1,000
Lot Details
marked on ivory plaque on the crossbar; with ivory scale divided -3º to 107º; brass index arm; ivory vernier scale divided 0º-20 º; brass thumbscrew lock to back and screw adjuster to front; 3" telescope; brass mirror; four shades (blue, red, amber, green); horizon glass adjustment by lever and adjuster screw. c.1820.
